Method of constructing strainer supports



NOV 28, 1933- l. J. B. DEMERS METHOD OF CONSTRUCTING' STRAINER SUPPORTS Original Filed Nov. 24. 1930 Pfff gn/vanto@ Im 'eJi/zers Patented Nov. 28, 19.33

Superior Metal Products Company, St. Paul,` v Minn., a corporation of llffelawaref'iy Original application November .24, 1930, Serial 497,695.` Divided and. this. application March 5, 193.2.r .serial NQ. 596,955 v g u 2 claims. V(o1. ,2o-44s)k .1 f.

This .invention relates to a strainer or iilter for milk or other liquids.

It is my object to provide anovel strainer adapted to permit the rapid passage ofliquid therethrough and so vconstructed that cleansing is facilitated. Y

More particularly, it is my object to provide Ainexpensive means for adequately supporting a fragile filter or strainer fabric while permitting a maximum ratel of flow through said fabric.

The invention includes a novel method of constructing the supporting element for the filter fabric whereby the cost of construction is reduced to a minimum consistent with durability and production of a sanitary structure.

As is well known, considerations of sanitation and facility of cleansing are of prime importance in equipment for the treatment of milk and numerous other liquids. My device is rendered unusually sanitary by the elimination of all small recesses and inaccessible surfaces where contaminating matter'may lodge.

Referring to the accompanying drawing, Figure l is a central vertical section through my improved strainer;

Fig. 2 is an enlarged vertical section showing in detail a part of the bottom of the strainer;

Fig. 3 is a plan View of the bottom of the support for the filter fabric;

Fig. 4 is a horizontal section taken on the line 4-4 of Fig. 1;

Fig. 5 is a side view of the spring detent for the filter fabric;

Fig. 6 is a fragmentary plan viewshowinga number ofthe connections between the supporting rods and filler ring;

Fig. 7 is an enlarged section through one of the rods and showing the adjacent portion of the filler ring, and

Fig. 8 is a section taken on the line 8 8 of Fig. 7.

My device has a casing 10 of sheet metal to receive the milk or other liquid at the top and to direct it to a large, circular opening 11 in its bot-l tom. Adjacent to the opening 11 the casing is formed with an annular flange 12. An outer ring 13 ts snugly about the bottom of the casing and has a ange 14 extending in spaced, parallel relation to the flange 12. Between the anges 12 and 14 is placed a filler ring 15 having a slotted inner periphery to receive a multiplicity of small rods 16. These rods are secured to the ring and form a grid for supporting a lter fabric 17 which is held in place by a foraminous guard disk 18. The margin of the fabric 17 is held,

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between the flange 142 and the peripheralportion I V of the guard 18, the central portion of 'said guard being oifset upward to allow the free passage of the liquid tothe entireA top surface ofthe fabric 17; To hold the guard ring 18 in place, T. provide an arcuate springjlg' adapted tobe sprung into place beneath a bead 20 formed in the casing l0. The ends 2r1 of the spring 19 are bent `upward in spaced, parallel relation to each other to facilitate insertion and removalof the spring. A small knob 22 is fixed centrally on the guard 18'to Vbe manipulated-in removing and replacing. Y l f The rods 16 are greater in thickness than the ring 15, as clearly indicated in Figs. 2, 7 and 16 laterally in the slots Whilereducing the thickness of the reds to conform to the thickness of the ring 15. When the press is operated, the

ends of the rods are reduced in thioknessfrom the I size indicated in dotted lines'in Fig. 8 while they them to the ring. All of the rods may thus `be secured in one operation of the die, Th'e com-. plete rod assembly is then placed on the bottom surface of the flange 12 and the ring 13 is forci- `ply pressed in place with its ange le gripping the ring 15. yIt lwill be noted that the spaces between the flanges l2 and 14 and ends of the rods are completely filled by the ring. 15 so that there are noinaccessible recesses betweenl rods Where contaminating material may lodge. v p

Loosely Vfelted cotton or paper iibres are usually employed in the ltering fabrics and suchfabrios have insufficient strength to be self-supporting in the strainen By providing the support for the strainer or filter fabric consisting of propf. L

When the device is to be cleansed, the ends 21H of the spring 19 are merely pressed toward each other to contract the spring suniciently to permit vthe liquid is forcibly delivered intothe empty strainer.

v entire strainer may be immersed for sterilization.

This application is a division of my app1ication for patent for Strainers, Serial No. 497,695,

` led November 24, 1930.

Having described my invention,l what I claim as new and desire to protect by Letters Patent 1. The steps in the method of constructinga strainer support consistingfof a series of rods and a relatively thin, marginal frame Which comprise forming, in the inner, opposite sides of said frame, a series of slots adapted to'loosely receive the ends of said rods, cutting said rods to t in as Y spaced, parallel relation to each other in saidv slots, then placing said rods in the plane of said frame with their ends abutting said frame kin said slots and applying pressure to the endsoi` said rods in such direction as to reduce the same Y Yto the thickness of said frame 'While enlarging said ends laterally to t tightly in the slots.

2. The stepsin the method of vconstructing a strainer support consisting of a lseries of rods and a relatively vthin ring which comprise forming, in the inner, opposite peripheries of said ringtwo series of slots adapted to loosely receive opposite ends respectively of' said rods, cutting said rods to t ,in spaced, parallel relation to` reach other in said slots, then placing said rods Within said ring and With their ends abutting said ring in said slots Yand applying pressure to the ends of said rods to reduce the same to the thickness of rsaid ring while enlarging said ends Vlaterally to lit tightly in the slots.

ISA-i1: J. B. DEMERS. 

